唐突|とうとつtoutotsu[0]heiban (flat)

1. na-adjective, nounabrupt; sudden
   唐突とうとつな質問しつもんに彼かれは泡あわを食くった。↗

   He was confused by a sudden question.

• Synonym不意ふいNeutralMeans catching someone off guard, as in 「不意を突く」「不意の事故」; stresses being unprepared, not the abruptness of speech or behavior.
• Synonym突然とつぜんNeutralThe most versatile word for 'suddenly', neutral and objective; 「唐突」 usually carries a judgment of abruptness or lack of buildup.
• Synonym急きゅうNeutralCommon in speech as 「急に」; covers suddenness and urgency, and carries no hint of rudeness.
• SynonymにわかNeutralCovers suddenness and hasty, last-minute preparation, as in 「にわか雨」「にわか仕込み」.
• Synonym出し抜けだしぬけNeutralColloquial for something done or said out of the blue, as in 「出し抜けに」; close in sense to 「唐突」, which leans more written.
• Related思いがけないおもいがけないNeutralFocuses on the speaker being caught off guard; 「唐突」 stresses words, actions or events coming abruptly with no buildup.
• Related意外いがいNeutralSays a result differs from what was expected; it does not judge whether words or actions were out of place.
• Related急激きゅうげきNeutralDescribes sharp, rapid change, stressing the size and speed of the shift, as in 「急激な変化」.
• Related予想外よそうがいNeutralEveryday word for results that defy expectations; focuses on the outcome being a surprise.
• Related卒爾そつじWrittenArchaic word for abruptness bordering on presumption, mostly as 「卒爾ながら」 to apologize for speaking up; rare even in writing.
• Related慮外りょがいWrittenOld written word meaning both unexpected and rude or discourteous; rarely used today.
• Related意想外いそうがいWrittenWritten-style word for what was not anticipated, often as 「意想外の結果」, an unexpected result; stresses falling outside what one foresaw.
• Related短兵急たんぺいきゅうWrittenImpetuous and headlong, usually as 「短兵急に」; describes plunging straight into something.
• Related思いもよらないおもいもよらないNeutralSet phrase for something you could not even imagine; stronger than 「意外」 and free of any rudeness nuance.
• Related思わぬおもわぬNeutralPre-noun word that only modifies nouns, as in 「思わぬ事故」.
• RelatedひょんなNeutralColloquial pre-noun modifier for odd or chance occurrences, as in 「ひょんなことから」.
• Related予期しないよきしないNeutralPlainly objective: not anticipated beforehand; no judgment of the words or actions involved.
• Related突発的とっぱつてきNeutralUsed for things that break out suddenly, chiefly accidents and disasters, as in 「突発的な事故」.
• Antonym漸次ぜんじWrittenAntonym: written word for proceeding gradually, the opposite of sudden 「唐突」.
• Antonym徐々じょじょNeutralAntonym: slow and gradual, usually as 「徐々に」; the natural opposite of 「唐突」.
• Antonym順序立つNeutralAntonym: orderly and methodical, the opposite of the jarring abruptness of 「唐突」.

Use 「唐突」 when words, actions or a story development come out of nowhere and feel jarring or uncalled-for, as in 「唐突な質問で恐縮ですが」「唐突な展開」. For plain suddenness choose 「突然」 or 「急に」; for the merely unexpected, 「意外」 or 「思いがけない」. 「不意」 and 「出し抜け」 stress being caught off guard, 「突発的」 fits accidents and disasters, 「急激」 sharp change, and 「徐々」 is the gradual opposite. The remaining words are rare, written-style, or narrower.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 出し抜だしぬけ。突然とつぜん。